83
110328-02 - 6/22
ALTA
Installation, Operating & Service Instructions
18
Troubleshooting
(continued)
Table 18-6: Detailed Fault Code (found on "
cc
" and "
bb
" menus, continued)
Code Detailed
Code
Type
Condition
H24
E24
H24
.
0
Warning
Flame signal loss in operation.
H24
.
1
Hold
Flame signal loss in stabilization phase.
H24
.
2
Hold
Flame signal loss in safety time.
E24
.
3
Lockout
Flame signal loss in safety time.
H25
E25
H25
.
0
Hold
Hardware Fault, Internal Safety core error.
E25
.
2
Lockout
Hardware Fault, Internal Application error.
E25
.
3
Lockout
Hardware Fault, Internal Safety core error.
E25
.
4
Lockout
Hardware Fault, Internal Safety core error.
E25
.
5
Lockout
Hardware Fault, Internal Safety core error.
E25
.
6
Lockout
Hardware Fault, unknown Error.
H26
E26
H26
.
0
Hold
Calibration Fault, Offset adaption not executable, Stable adaption conditions could
not be reached in a certain time.
H26
.
1
Hold
Calibration conditions fault, Conditions for calibration were not reached in a 5 min
timeout period, Blocking, Burner stop and restart.
E26
.
2
Lockout
Calibration Fault, Missing calibration, Calibration not carried out, although required.
Calibration counter reached zero, check why calibration management did not work.
H26
.
3
Warning
Emergency stop, The burner had to be stopped during calibration/adaption either
due to high outlet/DHW temperature or a blocking /lockout error.
H27
H27
.
0
Hold
120 VAC supply voltage less than 73 VAC.
H28
H28
.
0
Hold
Control 24 VAC wrong frequency or high electrical noise.
E29
E29
.
0
Lockout
Excessive
!
reset
button selection.
H30
H30
.
0
Hold
Duplicate Slave Boiler Addresses.
H30
.
1
Warning
Sequencer slave has lost communication with Sequencer Master, master header
sensor failure.
H30
.
2
Hold
Multiple sequencer masters detected.
H30
.
3
Warning
No valid modbus setpoint signal.
H30
.
4
Warning
No valid modbus modulation signal.
H31
H31
.
0
Hold
Variable Speed Pump Fault and pump feedback is used to prove boiler water flow.
H31
.
1
Warning
Variable Speed Pump Fault and flow switch is used to prove boiler water flow.
H32
H32
.
0
Warning
Zone Panel 1 Communication Lost.
H32
.
1
Warning
Zone Panel 2 Communication Lost.
H32
.
2
Warning
Zone Panel 3 Communication Lost.
H32
.
3
Warning
Zone Panel 4 Communication Lost.
H32
.
4
Warning
Zone Panel Electronics Failure.
H32
.
5
Warning
Duplicate Zone Panel.